Spectra-Stick strikers are not just colorful and beautiful to look at, they sound great on calls. They produce a higher pitched yelp with a little rasp tossed in. These are made from Spectraply which is dyed birch wood laminated with a PVA glue under pressure. 
Note: some colors may be discontinued without notice due to the manufacturer eliminating some colors from their production. Some color combos are limited to the supply of that color I have on hand.