The E1NS is one of the most run yo-yos from ILYY, with batches ranging from 2006 to 2023. Even with a gap of 10 years between some runs, the E1NS has proven to be one of the more popular ILYY models. Of course, there have been some changes over the years. Let’s break those down.
Prototype #1

Release: October 2006
Diameter: 49.90mm
Width: 39.70mm
Weight: 66.30
Bearing: C
Response: ???
The first prototype of the E1NS had a run of 3 raw units.
Prototype #2

Release: January 2007
Diameter: 50mm
Width: 40mm
Weight: 74
Bearing: C
Response: ???
The second prototype of the E1NS had a run of 23 raw units.
Prototype #3

Release: May 2007
Diameter: ???
Width: ???
Weight: ???
Bearing: L
Response: 15x22x2 pads
The third prototype of the E1NS had a run of 1 orange/black unit with a Candodize finish and 1 orange/black unit with a Soda Blast finish.
Prototype #4

Release: May 2007
Diameter: ???
Width: ???
Weight: ???
Bearing: L
Response: 15x22x2 pads
The third prototype of the E1NS had a run of 9 Canadize finish units with the following colors: Clear, Titanium, Green, Blue, Purple, Red, Orange, Gold, and Black.
Initial Run
Release: July 2007
Diameter: 49.80mm
Width: 40.70mm
Weight: 61.60g
Bearing: L
Response: 15x22x2 pads
The initial production run of E1NS consisted of 58 units in an orange/black colorway with a Candodize finish.
Special Run #1

Release: November 2007
Diameter: 50.10mm
Width: 40.90mm
Weight: 65.50g
Bearing: L
Response: 15x22x2 pads
Special Run #1 came in a pearl colorway with a PulsCoat finish. There were 50 units released.
Run #2

Release: October 2008
Diameter: 50.10mm
Width: 41.20mm
Weight: 68.10g
Bearing: L
Response: 15x22x2 pads
Production Run #2 came in an orange/black colorway with a Candodize finish. There were 60 units released.
Special Run #2

Release: January 2009
Diameter: 50.10mm
Width: 41.20mm
Weight: 61g
Bearing: L
Response: 15x22x2 pads
Special Run #2 came in an orange/black colorway with a CandyBlast finish. There were 50 units released.
PrePro Run #1

Release: January 2009
Diameter: 50mm
Width: 41.70mm
Weight: 67g
Bearing: L
Response: 15x22x2 pads
PrePro #1 came in an orange/black colorway with a CandyBlast finish. There were 50 units released.
Run #3

Release: November 2009
Diameter: 50.10mm
Width: 41.20mm
Weight: 66.60g
Bearing: L
Response: 15x22x2 pads
Production Run #3 came in an orange/black colorway with a Candodize finish. There were 90 units released.
Special Run #3

Release: November 2009
Diameter: 50mm
Width: 41.70mm
Weight: 66.6g
Bearing: L
Response: 15x22x2 pads
Special Run #3 came in an purple/green colorway with a Candodize finish. There were 22 units released.
Run #4

Release: November 2009
Diameter: 50.10mm
Width: 41.20mm
Weight: 68g
Bearing: L
Response: 15x22x2 pads
Production Run #4 came in an black colorway with a Candy Blast finish. There were 90 units released.
PrePro Run #2

Release: February 2024
Diameter: 49.80mm
Width: 41.30mm
Weight: 64.55g
Bearing: C
Response: 15x22x2 pads
PrePro #2 came in an orange/titanium colorway with a Candodize finish. There were 20 units released.\
Run #5

Release: June 2021
Diameter: 49.80mm
Width: 40.35mm
Weight: 61.50g
Bearing: C
Response: 14x19x1.2 pads
Production Run #5 came in an red/black colorway with a Soda Blast finish. There were 63 units released.
Run #6

Release: February 2022
Diameter: 49.80mm
Width: 40.35mm
Weight: 61.50g
Bearing: C
Response: 14x19x1.2 pads
Production Run #6 came in an green/grey colorway with a Soda Blast finish. There were 40 units released.
Run #7



Release: February 2022
Diameter: 49.80mm
Width: 40.35mm
Weight: 61.50g
Bearing: C
Response: 14x19x1.2 pads
Production Run #7 came in an blue/grey colorway with a Soda Blast finish. There were 44 units released.