Pusher vs Puller Electric Fan

hi, its a puller, 45mm thickest part on blade housing 70mm fan motor, will get a serial no and piccy tomorrow, i bought it off egay, the guy listed it with model no, cross referance that against spal website, gives you technical info,cfm,and importantally dimensions. if the number is followed by an "s" this would indicate its a sucker! i rate them highly.