Essentra round through hole plastic spacers essentra ss4 2 ideally suited for pcb packaging and stacking applications these spacers supports are used for board to board and chassis to board requirementsdurable and lightweight these spacers supports are manufactured from high grade cpvc they feature one piece moulded construction which ensures consistent close tolerance dimensions and high strength essentra ss4 2 round m25 through hole 64mm spacer pvc pack of 25