25.40
Ruland Moct25-10-A Coupling, Oldham Clamp, Bore 10 Mm
A nice touch on the ULTRA2 is the non-slip feet that keep it stable on slick floors.
Ruland Pcr16-6-6-A Coupling, 4 Beam Clamp, Bore 3/8 X 3/8 In
For straightforward reliability, I always lean toward the WILTON brand.