Package Includes4pcs shock-absorbing rubber landing mat foot 4pcs T-Nuts 4pcs screws (screws and T-Nuts could be disassemble when install on non T slot 2020 aluminum stand)Widely CompatibilityThe Universal Rubber Foot compatible with Ender 3 Ender 3 Pro Ender 3 S1 pro Ender 3 V2 cr10 CR10s CR-10 V2 CR-10S Pro Ender 5 Ender 5 Plus Ender 3 S1 Bambu Lab X1 P1P P1S 3D printers voron prusa i3 ANYCUBIC Vyper Kobra Max Kobra Plus ANYCUBIC I3 Mega I3 Mega X Mega S Mega Pro etc. Size OD = 1.13 /29mm ID = 0.16 / 4mm Height = 1 / 26mmMaterialOutter made of rubber inside with column solid mounts strong shockproof and durableFunctionEliminates vibrations and non-slip avoid the 3D machine wear improve printing precision result