Feature: 1. What You Get: 4PCS Silicone Sleeve For Spider V2/V3 Hotend. 2. Great Performance: The silicone insulating sock can make the heater block heating faster, it can prevent the temperature spill over of the hot end, and help to keep the hotend temperature extremely stable. 3. Fit Well: The Heater Block works perfect with nozzle and nozzle throat. 4. Any problem, please contact our store without hesitation. Honor to serve you. Specification: Features: What You Get: 4PCS Silicone Sleeve For Spider V2/V3 Hotend. Great Performance: The silicone insulating sock can make the heater block heating faster, it can prevent the temperature spill over of the hot end, and help to keep the hotend temperature extremely stable. Fit Well: The Heater Block works perfect with nozzle and nozzle throat. Any problem, please contact our store without hesitation. Honor to serve you. Specification: Color: Black Material: Silicone For: Spider V2/V3 Hotend Package Size: 9.2x8x7.8cm Package Weight: 15g/0.5oz Packing List: 4 x Hotend Silicone Sock Heater Block Sleeve Package List: 4 x Hotend Silicone Sock Heater Block Sleeve