Precisely honed, heavy wall thickness tubes. Piston rod ground and hard chrome plated, where plating thickness is 15 to 20 microns, made of EN Grade material. Extra long bearing housing for better piston rod guide. Piston and piston rod guide-rings made of bronze filled teflon for less friction and scratch proof performance. Piston fitted with best quality seals (Glyd rings with 'O' ring energizer) piston rod guide fitted with step seals with 'O' ring energizer and PU Rod Seals for zero leakage from rod side.