Caldercraft Model Boat Fittings 8107TN 7mm Triple block. Natural.
Sold In packs of 10, these triple blocks measure ((h) x (w) x (d)) 7mm x 4.7mm x 4.5mm and are available in natural boxwood.
Equivalent manufacturers part number cross references:
Artesania AL8532
Billing Boats BF681
Caldercraft 8107TN
Mantua 37111